Turn Off Do Not Disturb (DND) on a Polycom phone
To turn off DND mode press the “Do Not Disturb” button again, or press the “Menu” key followed by “Features” and “Do Not Disturb”. This will return the phone to normal operation, allowing it to receive calls.
System Wide No DND Mode
The “Do Not Disturb” feature may be turned off for all phones system wide at [...]

